#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{
    int n = 0;
    int count = 0;
    scanf("%d", &n);
    while (n)
    { 
        if (n == 1)
            break;
        if (n % 2 == 0)
        {
            n = n / 2;
            count += 1;
        }
        if (n % 2 != 0&&n!=1)
        {
            n = (n * 3) + 1;
            n = n / 2;
            count += 1;
        }
       

    }
    printf("%d", count);

    return 0;

}